There is no “the Rabbonim.” Different groups have different standards and you know what? That’s OK. We’re all klal Yisrael and we all follow the same Torah but we are not and were never intended to be clones.
I personally wear long skirts and I find it quite amusing that I would be kicked out of your typical Bais Yaakov (I’m way past HS so that’s not really an issue) when in the alte babba’s day a girl wearing today’s BY uniform would have been run out of town for her short skirt.
I agree that it’s appalling the way some frum women dress, and it’s also appalling that some frum men can’t shut their mouths in shul, and and and. We all have stuff to work on. Yes, the way people dress does affect others and if that’s really your top concern, move to Williamsburg. Oh, wait, you’ll still see everything on the street. I guess New Square or Kiryas Joel might work, except that even there the household help wear what they please. I guess you’re stuck. Maybe smear some Vaseline on your glasses.
And by the way, I wouldn’t be so quick to say the laxity in shmiras halashon is less of a problem than the laxity in tznius.